# UnavailableExceptionFallbackException

Package: [Microsoft.Orleans.Serialization](/orleans/docs/api/csharp/microsoft.orleans.serialization/) 10.0.0

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Serialization) | [Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/ISerializableSerializer/UnavailableExceptionFallbackException.cs#L13)

```csharp
public sealed class UnavailableExceptionFallbackException : Exception
```

Represents an exception which has a type which is unavailable during deserialization.

## Constructors

- [UnavailableExceptionFallbackException](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.unavailableexceptionfallbackexception/constructors/constructor-5fb0b9b9/)
- [UnavailableExceptionFallbackException(SerializationInfo, StreamingContext)](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.unavailableexceptionfallbackexception/constructors/constructor-system-runtime-serialization-serializationinfo-system-runtime-serial-552d609d/)
- [UnavailableExceptionFallbackException(string, Exception)](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.unavailableexceptionfallbackexception/constructors/constructor-string-system-exception-e0900d01/)

## Properties

- [ExceptionType](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.unavailableexceptionfallbackexception/properties/exceptiontype-47560a8c/)
- [Properties](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.unavailableexceptionfallbackexception/properties/properties-fc221f65/)

## Methods

- [ToString](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.unavailableexceptionfallbackexception/methods/tostring-3256a2ec/)